The Leatherback Turtle is the biggest of the world’s turtles, and the most endangered. The Pacific Leatherbacks come ashore on the Pacific coast of Mexico and Costa Rica, whilst the Atlantic ones can nest in the Caribbean. They grow up to as much as 2 metres in length and can be a massive 700kg – only three species of crocodile are bigger in the reptile family. Unusually they don’t have bony carpaces, but a leathery hide. They are Critically Endangered, and according to some estimates, 95% extinct. But it’s not the only turtle in danger. The Olive Ridley, Green, Kemps, Loggerhead and Hawksbill all face extinction if something isn’t done to help them. Which would be sad – the sea turtle is the world’s oldest animal.